Is the router s network cable fiber optic

Most home routers are connected to fiber internet via an ONT using an Ethernet cable, not directly with a fiber optic cable.

How Fiber Internet Connects to Your Router

Fiber optic internet delivers data as light pulses through thin glass or plastic strands, which requires specialized equipment to convert these signals into a form your router can use. Typically, a fiber optic cable from your ISP connects to an Optical Network Terminal (ONT), which then converts the optical signals into electrical signals transmitted over a standard Ethernet cable to your router. This means the cable physically plugged into your router is usually Ethernet (RJ45), not fiber.

Identifying Fiber vs Ethernet CablesFiber optic cable: Thin, often yellow, with SC/APC or SC/UPC connectors; transmits data as light. Ethernet cable: Thicker, flexible, with RJ45 connectors; transmits electrical signals; commonly used to connect the ONT to your router. In most residential setups, the fiber never plugs directly into a standard consumer router.

Only routers with SFP/SFP+ ports or fiber-ready WAN ports can accept a direct fiber connection, which is uncommon in typical home routers.

Special Cases

Some IS

Ps provide a combo device that integrates the ONT and router in one unit. In this case, the fiber cable enters the device directly, but internally it still converts the optical signal to Ethernet for distribution to your devices.

Conclusion

If your router is a standard consumer model, the cable connected to it is almost certainly Ethernet, not fiber optic. The fiber optic cable from your ISP terminates at an ONT or combo device, which then uses Ethernet to connect to your router. To use a direct fiber connection, you would need a router specifically designed with fiber input capabilities.